C++: calculated float does not enter if

Question

Hi, I need help. I’m not getting into the "if" parole with a floating number obtained after an operation. In the code below when I declare the value 0.05 enters the "if", but when I get the 0.05 by subtracting two float does not enter the "if" and I need to operate values to solve my exercise.

#include<iostream>
using namespace std;

int main(){
    
    float v1=2;
    float v2=1.95;

    float diferenca = v1-v2;
    cout << diferenca << endl;
    
    if (diferenca == 0.05){
        
        cout << "entrou"<< endl; // NAO ESTA A ENTRAR !
    }
}